Thx for all the comments. Just giving you the results, of course no idea if every car was flat out and going as hard as I was...but the GTR was, and the gt3 was during the comparisons I made or I wouldn't report it, would have no meaning.
M3 was so predictable and I could place the car on the apex, I was focused on getting on the gas as fast as possible to try to keep up with those faster cars.
Main point is the M3 is a very fun and capable car, owners should take a try at a track event.